''Diamond Dogs'' is a novella by Creator/AlastairReynolds, set in his ''[[Literature/RevelationSpaceSeries Revelation Space]]'' [[TheVerse universe]].

In a universe where all the aliens [[AbsentAliens seem to be dead]] or [[InvisibleAliens hiding]], a potentially huge discovery is made: an ancient alien tower is found on a lifeless planet. This tower, dubbed the [[NamesToRunAwayFromReallyFast Blood Spire]], killed the crew of the first ship to discover it. Before succumbing to his horrific wounds, the last survivor recounted how the tower "tested" the crew. [[OnlySmartPeopleMayPass Pass the increasingly-difficult tests]] and you can possibly ascend to the top of the alien tower and unlock its secrets. But get any of the questions ''wrong'', and...well, [[MutilationConga let's just say that very unpleasant things]] can [[BodyHorror happen to you]].

The novella follows the efforts of a new expedition team, led by a man named Childe, in their attempt to ascend the Blood Spire.
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!! This novella provides examples of:
* AlienGeometries: Comes into play as the tests become more and more difficult, the higher they ascend the tower; the challenges begin to involve higher-dimensional shapes and arcane math.
* AllForNothing: [[spoiler:Celestine allows Doctor Trintignant to augment her so she can enter the Spire one more time and convince her ex-husband to leave. She succeeds, but there's no place for him as a FullConversionCyborg back home and it's implied he's returning to the Spire at the end of the story, even though he suspects there's no great secret to be discovered at the top of the Spire anyway.]]
* CloningGambit: [[spoiler:Part of TheReveal about Childe. The first expedition to discover the Spire? Didn't exist. Childe discovered the tower himself and was killed when he entered it. All those mangled bodily remains outside the tower? Those are all ''Childe''; he repeatedly cloned himself, backing up his memory each time. He died over and over again attempting to ascend the tower. Eventually, when he couldn't proceed any further, he decided to enlist the help of other people. So he made up the story about the first expedition as a cover.]]
* CuriosityKilledTheCast: What's that? An [[EvilTowerOfOminousness ominous and inscrutable alien tower]] on a lifeless planet, you say? And you go inside and it tests you? And brutally punishes and/or kills you for failing? And the tests get ''harder'' as you go along? Sign me up!
* {{Cyborg}}: Doctor Trintignant is [[MadDoctor absolutely obsessed]] with cyborg-ifying anyone he can get his hands on, including himself. Badly injured people (like those retreating from the Blood Spire after being "punished") are a great opportunity for him.
* CyberneticsEatYourSoul: Played with. Doctor Trintignant was already pretty immoral, even before he began experimenting on unwitting subjects (along with himself). On the other hand [[spoiler:Richard and Childe become pretty warped in their quest to beat the Spire; by allowing Trintignant to modify their bodies, they steadily become less human within and without.]]
* DownerEnding: [[spoiler:Everyone except Richard and Celestine are killed, with the possible exception of Childe, who might've suffered a FateWorseThanDeath. Richard and Celestine are unable to reverse the radical changes they made to their bodies because society back home has collapsed (thus the technology no longer exists) and Dr. Trintignant, the only other person who can do it, kills himself. They're forced to eke out a bleak and poor existence in Chasm City to survive, with Richard having to pretend to be a strange looking dog, due to his appearance. Eventually, the situation, combined with his memories and obsession with the Spire, causes him to give up and throw away his life with Celestine to return to the Spire (where he'll almost certainly be killed or worse, like Childe).]]
* DreamWeaver: The night before their first attempt on the tower, Childe somehow feeds the plots of various "popular narratives from history" in an attempt to mentally prepare them for the challenge (see ShoutOut below).
* EldritchLocation: The Blood Spire doesn't have any foundation on the planet's surface; it hovers above the ground with no means of doing so that anyone can detect.
* ForbiddenFruit: Despite being unquestionably dangerous, the crew can't help but keep on going into the Blood Spire, even after people start getting mutilated and/or killed. One character compares it to climbing a mountain: "''Because it's there.''"
* GeniusLoci: Though never explicit, it's heavily implied that the Blood Spire isn't a simple structure but is in some sense alive.
* TheGreatestStoryNeverTold: Celestine claims that this is the real reason Childe recruited them; while their help is useful, he never believes he won't succeed eventually, so this is merely so others will know of his achievement.
* IdiotSavant: Lampshaded by Richard after many augmentations. They now have enough mathematical prowess to ascend to the Spire's higher levels, but they perceive anything that's not mathematics as abstract, uninteresting, and requiring intense mental effort to follow.
* KarmicTransformation: Possibly with [[spoiler:Richard, the protagonist and narrator. He's repulsed by Doctor Trintignant's actions, but in his obsessive quest to beat the tower, he succumbs to more and more of Trintignant's modifications to make himself more able to complete the tests. By the end of the novella, him and Childe have had all their major body parts replaced and they resemble mechanical walking [[TitleDrop dogs covered in diamond armor]], rather than humans.]]
* MeaningfulName: A man with the name of [[Literature/ChildeRowland Childe]], in a quest to climb a [[Franchise/TheDarkTower Dark Tower]]? Who would [[spoiler:do anything to beat the tower, including ''dying multiple times, in a loop'', and sacrifice his friends]]?
* NeverFoundTheBody: Mostly averted, in that those killed by the Spire are unceremoniously ejected from the tower (sometimes in pieces, [[LudicrousGibs depending on how they died]]). Thus, the land surrounding the tower is littered with the remains of those who previously attempted the tower. [[PlayingWithTropes Played with]] in that the Spire keeps any mechanical parts, and in the end, [[spoiler:Childe's body is never found, implying either the Spire "harvested" him or that he had become entirely too mechanical for the Spire to eject.]]
* NothingLeftToDoButDie: [[spoiler:Doctor Trintignant]]'s reason for committing suicide. He knows [[spoiler:Richard and Celestine]] will ask him to undo [[spoiler:the radical modifications he performed on them]] when they return. However, he considers it his greatest work, and he can't bear to undo his greatest work. So he kills himself rather than go through with it. That's right, he killed himself ''just to spite them''.
* MorallyAmbiguousDoctorate: "Doctor" Trintignant. Seriously, who made this guy a doctor?
* NonActionGuy: Most the members of the expedition were chosen for their mental abilities, not their fighting abilities. The one possible exception would be Hirz.
* OnlySmartPeopleMayPass: A deconstruction of this trope [[spoiler: and [[BodyHorror the characters]].]]
* SchmuckBait: [[spoiler:Near the end Richard speculates that this might be the ultimate purpose of the Blood Spire. It lures in intelligent beings with its tests, forcing them to adapt their minds and bodies to pass its increasingly esoteric tests. Then, when they finally get to the top, they're "harvested" by the Spire like some kind of alien Venus Fly Trap.]]
* SelfDestructingSecurity: Why the characters don't just cut open the Blood Spire from orbit: they suspect it might destroy its own secrets in such a scenario.
* ShoutOut:
** There are two right near the beginning, in a sequence where the protagonist's party, about to enter the Blood Spire, are [[DreamWeaver dream-fed similar scenarios in case they help]]:
--->"I had the same dream," I said, wonderingly. "And there was another dream in which I was inside some kind of-" I halted, waiting for the words to assemble in my head. "Some kind of underground tomb. I remember being chased down a corridor by an [[IndyEscape enormous stone ball]] which was going to roll over me."\\
Hirz nodded. "[[Franchise/IndianaJones The dream with the hat, right?]]"\\
"My God, yes." I grinned like a madman. "I lost my hat, and I felt this ridiculous urge to rescue it!"
** And:
--->Celestine broke the silence, turning to Hirz. "Did you have the one about the cubes, too?"\\
"Christ, yes," the infiltration specialist said, as if suddenly remembering. "The cubes. What about you, Richard?"\\
"Indeed," I answered, flinching at the memory of that one. [[Film/{{Cube}} I had been one of a party of people trapped inside an endless series of cubic rooms, many of which contained lethal surprises.]] "I was cut into pieces by a trap, actually. Diced, if I remember accurately."\\
"Yeah. Not exactly on my top ten list of ways to die, either.'"
** Another of the dreams appears to involve ''Rogue Moon'' by Creator/AlgisBudrys, which has a similar premise.
** Childe's name is a ShoutOut to Literature/ChildeRowland of ''Literature/ChildeRolandToTheDarkTowerCame'', the poem that ''Franchise/TheDarkTower'' series was based upon.
* TitledAfterTheSong: The title is an implicit ShoutOut to Music/DavidBowie's album ''Music/DiamondDogs'' (which was based loosely on Creator/GeorgeOrwell's ''Literature/NineteenEightyFour'').
* TitleDrop: "Diamond Dogs" refers to the monstrous forms [[spoiler:Childe and Richard modify themselves into in order to beat the tower; by the end of the story, they resemble rottweilers standing on their hind legs, covered in a diamond fabric.]]
* TheUnreveal: It's never revealed what's at the top of the tower, though it's speculated that the whole thing might be nothing more than SchmuckBait [[spoiler:to "harvest" intelligent beings.]]
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